A friend and I are currently on a trip around the world.
We usually fly our hops spontaneously.. but today we could
agree on a certain time

Join us if you want.
We will fly at 22.00 MET (10pm).
I found this helpful link
to match different timezones.
So just look for Berlin.
http://www.timeanddate.com/worldclock/
Regarding the flight.
We are currently at Darwin Australia YPDN.
And we have no idea yet where we are going next.

(well we are flying eastwards)
we usually fly hops between 150 and 500 miles.
(Hopefully we